Scalper and grader



2 Sheets-Sheet 1.

(No Model.)

F. G. BOYNTON SGALPER AND GRADER. No. 462,618. Patented Nov. 3, 1891.

ATTORNEY.

(No Model.) 2 Sheets-Sheet 2. F. G. BOYNTON. SGALPER AND GRADER.

No. 462,618. Patented Nov. 3, 1891.

ITNESSE'S: INVENTOI? W Fan/7," Gjo m Z%@@/WV@ A T TOR/IE LY citizen of the United States, residing at Graf- 'ternal casing or frame-work which supports ings, is the main shaft B, upon which is cen- UNITED STATES PATENT OFFICE.

FRANK G. BOYNTON, OF GRAFTON, UORTII DAKOTA.

SCALPER AND GRADER.

SPECIFICATION forming part of Letters Patent No. 462,618, dated November 3, 1891.

Application filed June 22, 1891. Serial No. 397,075- (No model.)

To aZZ whom it may COILGGPIL:

Be it known that I, FRANK G. BOYNTON, a

ton, in the county of Walsh and State of North Dakota, have invented certain new and useful Improvements in Scalpers and Graders, as set forth in the accompanying drawings, forming part of this specification, in which Figure 1 represents a side elevation of my improved scalper and grader, showing one side of the adjustable centrally-hung frame removed. Fig. 2 is an end view of the same. Fig. 3 is a detail showing in plan the lower ends of the frames 0 and D and the means for vibrating the frame D endwise. Fig. 4 is a cross-sectional view of the same on the line 2 2 of Fig. 3. Fig. 5 is a perspective View of the spring-plate II and its adjusting-straps. Fig. 6 is an enlarged side View of the telescopic feed board. Fig. 7 is a plan view showing one end of the feed-board. Fig. Sis a detail of one of the feed-board sections.

My invention relates to certain new and useful improvements in machines for separating and grading flour, meal, or middlings ground on rolls, millstones, or other grinding machines or mills; and my invention consists in the constructions and combinations of devices which I shall hereinafter fullydcscribe and claim.

To enable others skilled in the art to which my invention appertains to make and use the same, Iwill now describeits construction and indicate the manner in which the same is car ried out.

In the said drawings, A represents the exthe operating parts of the machine. Extending transversely through this frame or casing, with its ends mounted in suitable beartrally hung a frame 0, open at its top and bottom and having mounted in its lowerends a knocker-shaft F, carrying at its center a knocker G, which is actuated by power de- 'ived from the main shaft through the medium of a belt a, passing from a pulley Z) on the main shaft to a smaller pulley c on the knocker-shaft, the said main shaft carrying,

also, at one end a band-pulley d, to which power is applied from any suitable source, and at its opposite end a pulley e, from which a beltfruns to a pulley g on the end of the feed-roll shaft h, this latter shaft having its feed-roll N mounted in a suitable housing at the upper part of the main frame, and the housinghaving an inclined feed-board R, for directing the flow of thematerial in the usual manner.

The frame G has mounted on its inner sides, near the upper and lower ends, suitable rollers E, upon which a sieve-frame D rests, while other rollers E, similarly mounted, rest upon the upper sides of the sieve-frame and assist in confining the sieve-frame D, so that its only movement can be an endwise one parallel with the outer frame 0, which carries it.

The knocker G is designed to operate against the middle portion of a wood or metal springplate II, bolted near its center to the lower end of the sieve-frame and having its ends unconnected with the sieve-frame and attached to metal straps J, adapted to be secured to the lower sides of the frame C and provided with bolts K, working in-slots M, whereby the straps may be adjusted to regulate the tension of the spring-plate, said straps being also slotted at L for the passage of the knocker-shaft F, and the middle portion of the spring-plate being provided with a wear-plate I, against which the knocker operates.

In the lower sides near the ends of the frame 0 are mounted pulleys Z, around which passes a belt m, carrying brushes n, which travel immediately below and against the lower face of the bolting-silk or wire-cloth of the sieve frame to keep the same from clogging, the said belt being operated by the belt which actuates the knocker or by any other suitable means.

From the foregoing description it will be observed that the frame 0, which carries the vibrating sieve-frame, is centrally hung upon the main shaft, so that said shaft serves as an axis, about which the frame may be turned to vary its inclination and the consequent flow of the material. As the knocker-shaft and knocker are carried by the frame 0, it is manifest the adjustment of the frame does not destroy or affect the alignment of the knocker with the sieve-frame, as the position of the several parts is always maintained without regard to the inclination of the frame. Therefore the sieve-frame maybe inclined from any position between a horizontal and vertical, and in whatever position it may be placed it receives the full force of the knocker, whose position with relation to the frame is always the same.

In order that the frame may be held after its desired inclination has been obtained, I connectthe lower end of the frame with a strap, rope, chain, or other connection P, which is adapted to be wound upon a drum Q, mounted on the main frame and havinga hand-wheel p and pawl-and-ratchet mechanism r for operating and controlling it. By this means the lower end of the frame 0 is prevented from dropping after the frame has been adjusted to the desired inclination.

The feed-board R, which I have disclosed in the drawings, is one especially adapted to operate with my centrally-pivoted frame, and

consists of a number of sections R, (see Figs. 6, 7, and 8,) adapted to slide one within the other to vary the length of the feed-board-to correspond with the adjustment to the frame 0, each section having side flanges 10 to prevent the stock from running over the sides of the board. The upper section of this feedboardislooselysuspendedfrom themainframe atll, and each succeeding section has secured to its upper .under surface a rod or wire 12, which extends beyond the sides of the section and is provided with eyes or loops 13, through which are adapted to pass rods or wires S, also suspended from the top of the machine, one

upon each side of the feed-board, the said rod or wire S also passing through aguide loop or eye 14 on the exterior of the frame C, and the lowermost section of the feed-board beingattached to the inner sides of the said frameby apin 15, so as to hold said lower section at any given distance above thesurfaceof the boltin cloth or wire-gauze with which the vibrating sieve is clothed. hen the feed-board is extended its full length, the several sections thereof are held in proper place by means of short chains 16, secured at their upper ends to the main frame and extending to the lower section and being secured to each of the sections. The materialto be separated is fed to the sieve-frame by means of the feed-roll and inclined feed-board R, and When the machine is in operation the knocker Gr operates against the spring-plate H and imparts to the sieveframe a short, quick, sharp jar endwise in the direction of the flow of the material on the sieve, giving to the sieve greater capacity and better results than is obtained by the use of the eccentrics and strap attachments common to this class of machines.

By confining the sieve-frame within the outerfranie, which remains stationary during the operation of the machine, it is manifest there can be no movement of the sieve-frame except the end motion before mentioned, as the rollers E and E prevent any other movement and also furnish a guide for the reciprocations of the sieve-frame. Therefore the latter frame has a smooth straight movement parallel with the outer frame C, to cause the material to flow down to the lower end of the sieve-frame without any jumping mot-ion.

My machine is designed especially to separate coarse or fine stock equally well, as the frame 0, which supports the vibrating sieveframe, is adjustable about its shaft to vary its inclination from a level to an' angle of forty-five degrees while running without interfering with the motion of the vibrating sieve and its actuating mechanism. The motion of the vibrating sieve-frame may be varied so that a light or heavy jar may be imparted by means of the tension-straps J before mentioned.

Having thus described my invention, whatI claim as new, and desire to secure by-Letters Patent, is

1. In a scalper and grader, the combination of the frame 0, a shaft passing transversely through the central portion of said frame, an adj usting mechanism at one end of said frame and an adjustable feed-board at the opposite, a sieve-frame located between the walls of the frame O,and means for imparting an endwise movement thereto, substantially as herein described.

2. A suspended feed-board consisting of a series of sections adapted to telescope and having end flanges and guide-loops, and rods secured at one end and passingloosely through said guides, substantially as herein described.

3. A feed-board consisting of a series of sliding sections, each provided with guideloops or eyes, in combination with rods passing through said loops, and flexible connections betwcen adjoining sections and holding themtogether, substantially as herein described.

4. The combination, with a swinging frame having guides 14, of a feed-board consisting of a seriesof connected slidable sections, the upper one of which is hung from a main frame while the lower one is connected with the swinging frame, and rods attached to the main frame, passing through the guides 14: and guides on the slidable sections and forming the connection between the feedboard and swinging frame, substantially as herein described.

5. In ascalper and grader, the main frame or casing and the main shaft, in combination with the frame C, mounted at its center upon said shaft so that its inclination maybe varied, a sieve-frame confined between the walls of the pivotal frame and. adapted to have an endwise movement only, a shaft mounted in the lower end of the pivotal frame, a k-nocker on said shaft in alignment with the sieve-frame for imparting a jarring IIO movement thereto parallel with the pivotal frame, a spring between the knocker and sieve-frame, and means for actuating the knocker-shaft, substantially as herein described.

6. In a scalper and grader, the combination of a main frame or casing, a centrally-pivoted frame therein having the rollers E and E, a sieve-frame confined between the rollers, so that it may have an endwise movement only parallel with the pivotal frame, a knockershaft and a knocker for actuating the sieveframe, a spring between the knocker and sieve-frame, and a traveling belt with brushes below the sieve-frame, said sieve-frame, spring knocker-shaft, knocker, and brush-carrying belt being mounted in the pivoted frame,

whereby the positions of these parts is main tained without regard to the inclination of the pivoted frame, substantially as herein described.

7. In a scalper and grader, the combination,

sieve-frame, the tension-straps connected with 35 said ends and slotted to receive the knockershaft, and bolts passing through slots in the straps and adjustably securing the straps to the pivotal frame, substantially as herein described.

FRANK G. BOYNTON. \Vitnesses:

JAs. E. HALL, DUNCAN MOLELLAN. 

